Add pricing breakdown and powder pre-fill to Job Details; surface voided invoice history

- Job Details: collapsible internal pricing breakdown card mirrors quote details breakdown
  (items subtotal, shop supplies, discount, rush fee, tax, total)
- Job Details: voided invoice history section shows previous invoices instead of hiding them
- Complete Job modal: pre-fills powder usage from QR-scanned / manually logged entries so
  staff don't double-log; consumes pre-logged credit per InventoryItemId before deducting net delta
- JobProfile: map ShopSuppliesAmount, ShopSuppliesPercent, IsRushJob, DiscountType/Value/Reason
  so the pricing breakdown has the data it needs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/PowderCoating.Application/Mappings/JobProfile.cs

@@ -52,6 +52,7 @@ public class JobProfile : Profile
             .ForMember(dest => dest.PrepServiceIds, opt => opt.MapFrom(src =>
                 src.JobPrepServices.Select(jps => jps.PrepServiceId).ToList()))
             .ForMember(dest => dest.TimeEntries, opt => opt.MapFrom(src => src.TimeEntries))
+            .ForMember(dest => dest.DiscountType, opt => opt.MapFrom(src => src.DiscountType.ToString()))
             .ForMember(dest => dest.IsReworkJob, opt => opt.MapFrom(src => src.IsReworkJob))
             .ForMember(dest => dest.OriginalJobId, opt => opt.MapFrom(src => src.OriginalJobId))
             .ForMember(dest => dest.OriginalJobNumber,